//@HEADER
// ************************************************************************
//
//                        Kokkos v. 4.0
//       Copyright (2022) National Technology & Engineering
//               Solutions of Sandia, LLC (NTESS).
//
// Under the terms of Contract DE-NA0003525 with NTESS,
// the U.S. Government retains certain rights in this software.
//
// Part of Kokkos, under the Apache License v2.0 with LLVM Exceptions.
// See https://kokkos.org/LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//@HEADER
#ifndef __KOKKOSBATCHED_EIGENDECOMPOSITION_TEAMVECTOR_IMPL_HPP__
#define __KOKKOSBATCHED_EIGENDECOMPOSITION_TEAMVECTOR_IMPL_HPP__

/// \author Kyungjoo Kim (kyukim@sandia.gov)

#include "KokkosBatched_Util.hpp"
#include "KokkosBatched_Eigendecomposition_TeamVector_Internal.hpp"

namespace KokkosBatched {

///
/// Team Impl
/// =========

template <typename MemberType>
template <typename AViewType, typename EViewType, typename UViewType,
          typename WViewType>
KOKKOS_INLINE_FUNCTION int TeamVectorEigendecomposition<MemberType>::invoke(
    const MemberType &member, const AViewType &A, const EViewType &er,
    const EViewType &ei, const UViewType &UL, const UViewType &UR,
    const WViewType &W) {
  /// view checking
  const int m = A.extent(0);
  assert(m == A.extent(1) && "Eigendecomposition: A is not square");
  assert(m == er.extent(0) &&
         "Eigendecomposition: Length of er does not match to A's dimension");
  assert(m == ei.extent(0) &&
         "Eigendecomposition: Length of ei does not match to A's dimension");
  assert(m == UL.extent(0) &&
         "Eigendecomposition: Length of UL does not match to A's dimension");
  assert(m == UL.extent(1) &&
         "Eigendecomposition: Width of UL does not match to A's dimension");
  assert(m == UR.extent(0) &&
         "Eigendecomposition: Length of UR does not match to A's dimension");
  assert(m == UR.extent(1) &&
         "Eigendecomposition: Width of UR does not match to A's dimension");
  // assert(W.extent(0) >= (2*m*m+5*m) && "Eigendecomposition: workspace size is
  // too small");
  assert(W.stride(0) == 1 &&
         "Eigendecomposition: Provided workspace is not contiguous");

  return m ? TeamVectorEigendecompositionInternal ::invoke(
                 member, A.extent(0), A.data(), A.stride(0), A.stride(1),
                 er.data(), er.stride(0), ei.data(), ei.stride(0), UL.data(),
                 UL.stride(0), UL.stride(1), UR.data(), UR.stride(0),
                 UR.stride(1), W.data(), W.extent(0))
           : 0;
}

}  // namespace KokkosBatched

#endif
